# 1561988

## 1,561,988 is an even composite number composed of three prime numbers multiplied together.

What does the number 1561988 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

1561988 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

## Prime factorization of 1561988:

### 22 × 79 × 4943

(2 × 2 × 79 × 4943)

See below for interesting mathematical facts about the number 1561988 from the Numbermatics database.

### Names of 1561988

• Cardinal: 1561988 can be written as One million, five hundred sixty-one thousand, nine hundred eighty-eight.

### Scientific notation

• Scientific notation: 1.561988 × 106

### Factors of 1561988

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 5024

### Divisors of 1561988

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 2768640
• Sum of proper divisors (its aliquot sum) s(n): 1206652
• 1561988 is a deficient number, because the sum of its proper divisors (1206652) is less than itself. Its deficiency is 355336

### Bases of 1561988

• Binary: 1011111010101100001002
• Base-36: XH8K

### Squares and roots of 1561988

• 1561988 squared (15619882) is 2439806512144
• 1561988 cubed (15619883) is 3810948494290782272
• The square root of 1561988 is 1249.7951832201
• The cube root of 1561988 is 116.0270448237

### Scales and comparisons

How big is 1561988?
• 1,561,988 seconds is equal to 2 weeks, 4 days, 1 hour, 53 minutes, 8 seconds.
• To count from 1 to 1,561,988 would take you about three weeks!

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 1561988 cubic inches would be around 9.7 feet tall.

### Recreational maths with 1561988

• 1561988 backwards is 8891651
• The number of decimal digits it has is: 7
• The sum of 1561988's digits is 38
• More coming soon!